package com.situ.web.controller;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.situ.web.entity.User;
import com.situ.web.service.UserService;

@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet{
	private UserService userService = new UserService();

	@Override
	protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		String name = req.getParameter("name");
		String password = req.getParameter("password");
		
		User user = userService.login(name, password);
		// 如果存在这样一个User对象，这个用户登录成功
		if (user != null) {
			// 将这个用户信息放到Session，判断用户是否登录就是根据Session里面有没有
			// 这个用户信息
			HttpSession session = req.getSession();
			session.setAttribute("user", user);
			// 登录完成之后重定向到学生列表界面
			resp.sendRedirect(req.getContextPath() + "/student?method=findByPage");
		} else {// 登录失败
			resp.sendRedirect(req.getContextPath() + "/fail.jsp");
		}
	}
}
